Internal-combustion engine.



T. L. FRATES.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAR.11,1913.

Patented Sept. 8, 1914.

2 SHEETSSHBET 1.

. Wikuwsg T. L. FRATES.

- INTERNAL COMBUSTION ENGINE.

11221110111101: FILED 11111.11. 1913.

1,109,982, Patented Sept. 8, 1914.

2 SHEETS-SHEET 2.

wivkmedfs e o M THOMAS L. FRATES, OF LIVERMORE, CALIFOBNIA.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented se t. 8, acre.

Application filed March 11, 1913. Serial No. 753,577.

To all whom it may concern:

Be it known that I, THGMAS L. Frame, a citizen of the United States, residing at leivermore, in the county of Alameda, State of California, have invented certain new and useful Improvements in Internal-Combustion Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appm'tains to make and use the same.

This invention relates to internal combustion engines and has for an object to provide a novel inlet valve mechanism which will promote the quick distribution of fuel to all parts of the cylinder above the piston so that the most effective operation of the engine will be promoted.

Another object is to provide a novel exhaust valve mechanism which will require minimum attention for promoting its most effective operation.

With the above objects in view the invention consists of certain novel details of c nstruction and combination of parts hereinafter fully described and claimed, it being understota that various modifications may he made in the minor details of construction within the scope of the appended claims.

In the accompanying drawings illustratingthis invention :-Figure 1 is an elevation with portions broken away. Fig. 2 is a longitudinal sectional view. Figs. 3, 4, 5 and (i are diagranin'iatic views showing the power, exhaust, suction, and compression strokes respectively. Fig. 7 is an enlarged lcmgritlulinal sectional view' through one of the cxhaust valve casings. Fig. 8 is a detail sectional view of a portion of one of the exhaust valve stems.

ltcierring now to the drawings in which like characters of reference designate similar parts, a two-cylinder internal combustion engine of the four cycle type is shown, the

' same including a crank case 10, cylinders 11,

and pistons 12 working in the cylinders and connected by connecting rods 13 to respective cranks hn a crank shaft 14-. The cylinders are surrounded by a Water jacket 15 having inlet and outlet connections 16 and 157 and also having a drain cook 18.

Bctueen the heads 15) of the cylinders and the bottom .20 of the water jacket there is proviced a flat fresh gas space 21 which is connected by suitable pipe connections 22 with a carburetor 23. In each cylinder head and on opposite sides or the center thereof is formed a pair of valve seats 24 and 25 in which are seated valves 26 and 27 which control the passage of fresh gas from thespace 21 into the cylinders. Of the pair of valves in each cylinder, one valve 26 opens downwardly and the other valve 27 opens upnnudly, both valves moving simultane ously. The value of this feature is that fresh gas is admitted sin'iultaneously from two points of considerable area on opposite sides of the center of the cylinder head and thus the quick intake of gas and quick'distribution of the same throughout all portions of the cylinder above the piston is promoted and the most elfective operation of the engine assured.

For actuating the inlet valves 24 and 25 of each cylinder a lever 28 is pivoted on a fulcrum 29 that is centered on the cylinder head. this lever being connected at one end to a rod 230 that projects into the crank case and is there equipped with a roller 31 which rides upon a cam 32 carried by a cam shaft 3?), the latter being actuated by a suitable train of gearing Ill from the crank shaft 14, and so timed as to lift the rod at the beginning of each :intake stroke of the piston 12. The stem 35 of the valve id-projects slidahly through a suitable bushing 36 in the water jacket and terminally contacts with the free end of the lever 28, and the stem 37 of the, valve 27 is loosely connected to the lever 28 on the opposite side of the pivot thereof from the valve stem 35. A helical spring 38 is confined under tension between a washer 3t) on the valve stem 35 and the foot 40 of the fulcrum. and normally holds the valve 2t) closed and the lever horizontal whereby the valve 27 is also held closed. When the lever is rocked by the cam, the valve 27 is opened upwardlyy'and the valve 26 is opened downwardly with'a resultant admission of fresh gas into the cylinder. \lhcn the cam releases the lever the spring 158 innncdiately returns the valves" to closed position.

On. each cylinder near the head thereof is arranged a substantially oblong valve casing 41 which communicates with the corrpression space 42 of the cylinder through a port 43. A slide yi'ilve 4A is confined in this casing and controls the exhaust of burnt gases from the cylinder. The valve is provided with a stem 4-5 which slidably projects through a bearin 46 on the cylinder a ming 10 How th act:

wing

1 i5 begil the muaust suction venom sinn h e 01 1mm 

